This aftermarket steel shock shaft is made for the HPI Baja BJ186f platform and supplied as model BJ186F/SH, serving as a direct replacement for RC-scale Baja shock units.
When rebuilding or upgrading your shocks: remove the shock cap and internal components, take out the old shaft, check seals and bushings for wear, then fit the replacement steel shaft and reassemble using the shock oil and spacer stack that match your tuning plan.
The shaft maintains piston alignment and resists bending under rough off-road use, providing a stable sliding surface that reduces binding during different valving and spacer setups; treat it as an accessory component for RC suspension tuning.
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